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Old 06-13-2008, 07:32 PM   #1
zatch83
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Homemade bumper / air tank
I'm making a bumper out of 3x5x1/4" rectangular steel tube. The plan is to seal it off with the welds and use my A/C compressor to fill it up. Has anyone ever done this before? Any idea how I should do it?

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Old 06-13-2008, 07:38 PM   #2
bushytails
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Lots of people have done that before. Try google.

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Old 06-13-2008, 07:55 PM   #3
redneckengineer
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This is a tried and true design the only thing that I would caution you on is having the ends tig welded or brazing over the the weld if you mig weld it. Once you stop the bead on a mig weld it is next to impossible to get it air tight. You will also want to pressure test the bumper after you weld it.
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Old 06-13-2008, 11:05 PM   #4
FASTnSPEEDY
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Yes, google is good one for all the info on that one, but like others have said, getting airtight weld on the end it a pain. Make sure in addition to the nipple you have a way to drain it out and maybe an air gauge. (nice but not necessary)

I just gave up and converted it into a fuel tank, I can store an extra 20 gallons in the front and rear bumpers! Just kidding.
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Old 06-13-2008, 11:43 PM   #5
eflores
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any one ever heard of arc welding with a stick?
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Old 06-13-2008, 11:52 PM   #6
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you mean smaw/stick, standard arc welding?

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Old 06-14-2008, 12:17 AM   #7
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I [lan on doing this with my new rockers...... plus this is my 50th post so now i can put up pics with no clicky...... woooohoooooo.!
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I live with in an hour of the coast so getting sea foam is easy, but isnt the salt bad for the fuel system??? and how about the people that live farther away can you just foam up water and sea salt ??? if so what kind of mix do I use ??? 1table spoon to a gal of water??? and then how do I "foam it up" mabe a little soap????
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Old 06-14-2008, 12:22 AM   #8
EricsXJ
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Stick welding is arc welding, as is Mig.

I've made my rocker into an air tank and it is working well. It is difficult to do but not impossible. This was also discussed recently in a thread I responded to in the ZJ section. I think you'll find it helpful. http://www.jeepforum.com/forum/f13/use-sliders-air-tanks-553071/
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Old 03-18-2009, 02:11 PM   #9
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How much pressure does the A/C compressor make?
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Old 03-18-2009, 04:45 PM   #10
RussoGuitar
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Originally Posted by EricsXJ View Post
Stick welding is arc welding, as is Mig.

I've made my rocker into an air tank and it is working well. It is difficult to do but not impossible. This was also discussed recently in a thread I responded to in the ZJ section. I think you'll find it helpful. http://www.jeepforum.com/forum/showthread.php?t=553071
What makes you say its difficult? I felt it was pretty straight forward...?
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Old 03-20-2009, 01:17 AM   #11
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What makes you say its difficult? I felt it was pretty straight forward...?
Making pretty looking welds is not that difficult. Making good welds that are air-tight IS difficult for many people including me. At least it was harder than I first anticipated.
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